GPS accuracy with Seeeduino LoRaWAN w/GPS

Arduino, Seeeduino Serials and mutants. Share your problems and experence on arduino compatible board such as seeeduino/stalker, etc.

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heath612
Pre-kindergarten
Pre-kindergarten
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Joined: Sat Sep 22, 2018 5:28 am

GPS accuracy with Seeeduino LoRaWAN w/GPS

Post by heath612 » Thu Oct 18, 2018 8:23 am

Is it fair to say the GPS on board the Seeeduino LoRaWAN w/GPS has low accuracy?

We've been collecting location data on a few units and have found that:
- the HDOP looks suspect (starts at 0, sometimes just increments, bounces around a bit)
- the altitude varies by 10's of metres
- the location moves around a area with a radius of about 80m with a stationary device, even when HDOP is <5.

I think maybe it's handy to have a GPS on board to get the time and rough location, but it's not much use for sub-10m use.

We'll be evaluating the Grove GPS next. I hope the SIM28 performs better!

bill.yu
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Re: GPS accuracy with Seeeduino LoRaWAN w/GPS

Post by bill.yu » Thu Oct 25, 2018 6:09 pm

Hi there,

please try and let us know. i checked SIM28 and L70 datasheet. it looks no big differences.
http://simcomm2m.com/En/module/detail.aspx?id=89
https://www.quectel.com/UploadFile/Prod ... n_V2.3.pdf
thanks.

heath612
Pre-kindergarten
Pre-kindergarten
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Joined: Sat Sep 22, 2018 5:28 am

Re: GPS accuracy with Seeeduino LoRaWAN w/GPS

Post by heath612 » Mon Nov 19, 2018 7:24 am

Spectacularly better. Very fast fix (too fast to time), even indoors, and a positional deviation of less than one metre when stationary outdoors.

The instructions on the GroveGPS web page didn't work though - I had to connect to D3 and change the pins to 3, 4.

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